Light: Full sun (6+ hrs/day)
Soil: Any average soil will do – Crusader hawthorn can tolerate wet and dry soils, and is not fussy about soil pH.
Water: Average water needs, drought tolerant once established.
Fertilizing: If desired, fertilize in early spring using a granular (not liquid) fertilizer formulated for woody plants, like a rose or tree fertilizer. One application a year is sufficient in most areas. However, if you are starting with a very small plant, you may wish to fertilize monthly through late July to encourage more rapid growth.
Pruning: Little needed. You may selectively prune out branches to achieve a desired shape and habit if you wish, but regular pruning is neither required nor recommended.